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Synthesis and Characterization of High-Performance Blended Alkali-Activated Geopolymer (FA/GBFS) from Industrial Wastes
https://orcid.org/http://orcid.org/0000-0001-6593-0717
https://orcid.org/http://orcid.org/0000-0003-1872-7809
Ordinary Portland cement (OPC) has a major contribution to the increment of greenhouse gases due to its increased demand as a construction material. To overcome this problem, researchers are being done to partially replace OPC by utilizing industrial by-products, which are cheap, and eco-friendly. Geopolymer is a new material having binding properties almost resembling the OPC. In this paper, fly ash (FA) and ground-granulated blast furnace slag (GGBFS) were used for geopolymer synthesis. A series of fly ash-based geopolymers was synthesized with varying NaOH (6 M, 8 M and 10 M) concentrations by blending GGBFS in ambient conditions. Compressive strength results show that more than 40% GGBFS in the blend of fly ash and GGBFS gives the desired strength, i.e., more than 35 MPa in an alkali activation at 27 °C, with high (6 M, 8 M, 10 M) molarity of the NaOH solution. In the isothermal conduction calorimetry test, the maximum heat of hydration was observed in the sample with 8 M NaOH and minimum with 6 M NaOH solution. In the durability test, the performance of the 1:1 blended FA-GGBFS system shows that the loss in strength is increased with the increase in alkali concentration. Samples with 6 M NaOH have shown a minimum loss, which was increased in the sample with 8 M and 10 M. Similar to the aforementioned, the loss of strength and loss in mass in the sample increased with the increase in alkali concentration. Also, characterization of prepared geopolymer samples (A66M, A610M, A56M and A510M) was done by XRD and FTIR spectroscopy.
Synthesis and Characterization of High-Performance Blended Alkali-Activated Geopolymer (FA/GBFS) from Industrial Wastes
https://orcid.org/http://orcid.org/0000-0001-6593-0717
https://orcid.org/http://orcid.org/0000-0003-1872-7809
Ordinary Portland cement (OPC) has a major contribution to the increment of greenhouse gases due to its increased demand as a construction material. To overcome this problem, researchers are being done to partially replace OPC by utilizing industrial by-products, which are cheap, and eco-friendly. Geopolymer is a new material having binding properties almost resembling the OPC. In this paper, fly ash (FA) and ground-granulated blast furnace slag (GGBFS) were used for geopolymer synthesis. A series of fly ash-based geopolymers was synthesized with varying NaOH (6 M, 8 M and 10 M) concentrations by blending GGBFS in ambient conditions. Compressive strength results show that more than 40% GGBFS in the blend of fly ash and GGBFS gives the desired strength, i.e., more than 35 MPa in an alkali activation at 27 °C, with high (6 M, 8 M, 10 M) molarity of the NaOH solution. In the isothermal conduction calorimetry test, the maximum heat of hydration was observed in the sample with 8 M NaOH and minimum with 6 M NaOH solution. In the durability test, the performance of the 1:1 blended FA-GGBFS system shows that the loss in strength is increased with the increase in alkali concentration. Samples with 6 M NaOH have shown a minimum loss, which was increased in the sample with 8 M and 10 M. Similar to the aforementioned, the loss of strength and loss in mass in the sample increased with the increase in alkali concentration. Also, characterization of prepared geopolymer samples (A66M, A610M, A56M and A510M) was done by XRD and FTIR spectroscopy.
Synthesis and Characterization of High-Performance Blended Alkali-Activated Geopolymer (FA/GBFS) from Industrial Wastes
https://orcid.org/http://orcid.org/0000-0001-6593-0717
https://orcid.org/http://orcid.org/0000-0003-1872-7809
Ordinary Portland cement (OPC) has a major contribution to the increment of greenhouse gases due to its increased demand as a construction material. To overcome this problem, researchers are being done to partially replace OPC by utilizing industrial by-products, which are cheap, and eco-friendly. Geopolymer is a new material having binding properties almost resembling the OPC. In this paper, fly ash (FA) and ground-granulated blast furnace slag (GGBFS) were used for geopolymer synthesis. A series of fly ash-based geopolymers was synthesized with varying NaOH (6 M, 8 M and 10 M) concentrations by blending GGBFS in ambient conditions. Compressive strength results show that more than 40% GGBFS in the blend of fly ash and GGBFS gives the desired strength, i.e., more than 35 MPa in an alkali activation at 27 °C, with high (6 M, 8 M, 10 M) molarity of the NaOH solution. In the isothermal conduction calorimetry test, the maximum heat of hydration was observed in the sample with 8 M NaOH and minimum with 6 M NaOH solution. In the durability test, the performance of the 1:1 blended FA-GGBFS system shows that the loss in strength is increased with the increase in alkali concentration. Samples with 6 M NaOH have shown a minimum loss, which was increased in the sample with 8 M and 10 M. Similar to the aforementioned, the loss of strength and loss in mass in the sample increased with the increase in alkali concentration. Also, characterization of prepared geopolymer samples (A66M, A610M, A56M and A510M) was done by XRD and FTIR spectroscopy.
Synthesis and Characterization of High-Performance Blended Alkali-Activated Geopolymer (FA/GBFS) from Industrial Wastes
Iran J Sci Technol Trans Civ Eng
Nag, Mukesh Kumar (author) / Kumar, Parmanand (author)
2023-08-01
21 pages
Article (Journal)
Electronic Resource
English
Durability of Geopolymer GBFS Concrete
| British Library Conference Proceedings | 2008